Casing Feed-Throughs CFT

with multimode fiber cable

Representative product images. Individual product images are found on the individual product pages.


Casing feed-through type CFT with integrated fiber cable
  • For bore hole Ø 10.7 mm
  • Integrated multimode fiber cable MMC
  • Fiber cables with core diameters Ø 50 µm - 600 µm
  • Different connector types


The fiber cables with casing feed-through made by Schäfter+Kirchhoff are equipped with with multimode fiber cables with core diameters Ø 50 µm - 600 µm. The casing feed-throughs type CFT are installed by threading the outer part of the fiber cable from the inside of the casing through the through hole.They are designed for casings with a Ø 10.7 mm through hole.

End-to-end fiber cable
All vacuum feed-throughs are supplied with a non-exchangable, continous, end-to-end fiber cable. That means there is no additional fiber connection (mating) at the vacuum flange.
The benefit is no additional coupling losses due to mating (especially important for small core diameters).

Multimode fiber cable
Inside the casing, the fiber cables are equipped with Ø 900 μm buffer made of Hytrel, Nylon or Tefzel. The part of the fiber cable outside the casing, has a Ø 3 mm cable with Kevlar strain-relief with bend protection both at the fiber connector and the flange.
As an option the connector can be made of amagnetic Titanium (connector type FC only).

Please refer to the individual MMC fiber cable pages for all fiber options. The connector types are described in detail here

How to order
For a specific feed-through please contact Schäfter+Kirchhoff. We additionally need information on:

  • Fiber type
  • Cable length inside / outside the vacuum
  • Connector type inside / outside the vacuum 

An example configuration can be found here.


130810090800.pdf (Dimensional drawing)
130810090800.stp (STEP model)
130810090800.stp (STEP model, for registered users only)

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Measurement tool for coupling into polarization-maintaining fiber cables